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The Kulshan caldera is a Pleistocene volcano in the North Cascades of Washington and one of the few calderas identified in the entire Cascade Range. [ 1 ] [ 2 ] It is the product of the Mount Baker volcanic field , which has a history stretching back to possibly 3.722 million years ago.
About Wikipedia; Contact us; Contribute Help; ... Calderas of Washington (state) (3 P) Calderas of Wyoming (1 C, 2 P) Pages in category "Calderas of the United States"
Volcanic calderas of Washington state, United States. Pages in category "Calderas of Washington (state)" The following 3 pages are in this category, out of 3 total.
Hannegan caldera is a 3.72 million year old volcanic collapse structure in the North Cascades of the U.S. state of Washington. [2] The caldera collapsed during two separate volcanic eruptions that produced as much as 140 km 3 of rhyolite ash.
On April 17, 1857, the Republican, a Steilacoom, Washington, newspaper, reported that "Mount St. Helens, or some other mount to the southward, is seen ... to be in a state of eruption". [ 13 ] : 228 The lack of a significant ash layer associated with this event indicates that it was a small eruption.
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Columbia River Basalt Province: Yellowstone hotspot releases a huge pulse of volcanic activity, the first eruptions were near the Oregon-Idaho-Washington border. Columbia River and Steens flood basalts, Pueblo Mountains, Steens Mountain, Washington, Oregon, and Idaho; most vigorous eruptions were from 14 to 17 Ma. [8]
Fifes Peaks are located east of the Cascade crest. Most weather fronts originating in the Pacific Ocean travel northeast toward the Cascade Mountains.As fronts approach, they are forced upward by the peaks of the Cascade Range (orographic lift), causing them to drop their moisture in the form of rain or snow onto the Cascades.